You can deposit whatever amount you want into your bank account, they just might ask questions regarding where the money came from, and if you show that you sold products there's zero issues.
well, there might be one small issue!
how can you 'show you sold products'? after all, you sold them!!
isn't the cash sufficient to show you sold products? hasn't it been sufficient for thousands of years?
Also have you heard about bookeping? It’s also a thing that has existed for thousands of years.
To sum up, what is the standard of records that the bank will accept? Is there one?
does the bank say, "we see you wrote that you sold 20 boxes of produce on Saturday"
Buy yeah, some banks in the EU might be overzealous and small/medium businesses can often run into issues related to their idiotic fraud prevention systems. But I don’t see how is that an issue with the system itself and not with the implementation.